Draft PPS18: Renewable Energy
Annex 1 Technology: Installation
G9. The collector, together with the glazing and insulation are generally mounted in a box which is usually coloured grey or black, typically of 1-2m2 in area. For an average residential domestic installation, some 4 or 5m2 of flat plate collector, or some 3m2 of evacuated tube are required. Typically, this would be mounted on a southerly facing roof pitch, or more rarely on a free-standing tilted frame on the ground, or a flat roof. Increasingly, collectors are becoming available that can be incorporated into a new or existing roof in much the same way as proprietary roof windows. Some systems use photovoltaics (PV) to provide power for the system pump. In this case, a separate PV module, typically 20cm by 40cm will be mounted adjacent to the solar hot water collector.
G10. Collectors rarely project more than 120mm above the existing roofline. Connecting pipework is normally run from the back of the collector directly through to the roof void, and is not normally visible from the exterior of the building. 11. Solar water heating collectors for swimming pools generally comprise a mat of neoprene, or other black rubberised material that is mounted near to the swimming pool. Typically this will have an area of about half that of the surface area of the pool. The collector may be mounted on the roof of an adjacent low building (such as a garage), or more commonly on a low ground mounted frame. The collector is often mounted flat, or only slightly inclined with the outlet higher than the inlet.